In what sense? Trademark dress? If so, it’s possible they could have applied and received a trademark although whether they have is a different question.
I’ve heard lots of good things about it but I’m not a fan of music streaming.
I have an iPhone XR and wear hearing aids that sync up with the iPhone but they’re not always perfect. You need to reboot your phone when you can’t hear music or YouTube videos. That usually takes care of the problem.